专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明申请

US20090185655A1 COMPUTED TOMOGRAPHY METHOD 审中-公开
标题翻译：计算机测图法
公开(公告)号：US20090185655A1
公开(公告)日：2009-07-23
申请号：US11575662
申请日：2005-09-23
申请人： Peter Koken , Andy Ziegler , Michael Grass , Thomas Köhler , Roland Proksa
发明人： Peter Koken , Andy Ziegler , Michael Grass , Thomas Köhler , Roland Proksa
IPC分类号： A61B6/00 , G21K1/00
CPC分类号： A61B6/032 , A61B6/027 , A61B6/4028 , A61B6/4085 , A61B6/4291
摘要： A computed tomography method and apparatus are provided wherein a radiation source moves circularly relative to an examination zone about an axis of rotation (14). The radiation source produces a cone beam of x-rays and the focal point of this cone beam is switched between at least two positions (23a, 23b) spaced apart from each other and arranged on a line parallel to the axis of rotation to enlarge the reconstructable examination zone parallel to the axis of rotation. Preferably, the image of the examination zone is reconstructed using an iterative reconstruction method, in particular an algebraic reconstruction method or a maximum likelihood method.
摘要翻译：提供了一种计算机断层摄影方法和装置，其中辐射源围绕旋转轴线（14）相对于检查区域循环移动。辐射源产生X射线的锥形束，并且该锥形束的焦点在至少两个彼此间隔开的位置（23a，23b）之间切换并且布置在与旋转轴线平行的线上，以扩大可重建检查区域平行于旋转轴。优选地，使用迭代重建方法，特别是代数重建方法或最大似然方法来重建检查区域的图像。

2. 发明授权

US07822171B2 Cone beam computed tomography with multiple partial scanning trajectories 失效
标题翻译：具有多个部分扫描轨迹的锥束计算机断层扫描
公开(公告)号：US07822171B2
公开(公告)日：2010-10-26
申请号：US12296945
申请日：2006-04-19
申请人： Claas Bontus , Thomas Koehler , Peter Koken , Andy Ziegler
发明人： Claas Bontus , Thomas Koehler , Peter Koken , Andy Ziegler
IPC分类号： A61B6/00
CPC分类号： G06T11/006 , A61B6/027 , G06T11/005
摘要： A computer tomography apparatus (100) for examination of an object of interest (107) comprising an electromagnetic radiation source (104) adapted to emit electromagnetic radiation to an object of interest (107), a detecting device (108) adapted to detect electromagnetic radiation generated by the electromagnetic radiation source (104) and passed through the object of interest (107), and a motion generation device (101, 119) adapted to move the electromagnetic radiation source (104) and the detecting device (108) with respect to the object of interest (107) along a first trajectory and along a second trajectory which differs from the first trajectory, wherein the second trajectory is selected in such a manner that electromagnetic radiation detected during performing the second trajectory provides data which complete mathematically incomplete data detected during performing the first trajectory to thereby allow a reconstruction of structural information concerning the object of interest (107).
摘要翻译：一种用于检查感兴趣对象（107）的计算机断层摄影装置（100），包括适于向感兴趣对象（107）发射电磁辐射的电磁辐射源（104），适于检测电磁辐射的检测装置由电磁辐射源（104）产生并通过感兴趣物体（107）的运动产生装置（101,119），适于相对于电磁辐射源（104）和检测装置（108）移动感兴趣的物体（107）沿着第一轨迹并且沿着与第一轨迹不同的第二轨迹，其中以这样的方式选择第二轨迹，使得在执行第二轨迹期间检测到的电磁辐射提供了完全数学上不完整的数据检测的数据在执行第一轨迹期间，从而允许重建关于感兴趣对象的结构信息（107）。

3. 发明申请

US20090262885A1 CONE BEAM COMPUTED TOMOGRAPHY WITH MULTIPLE PARTIAL SCANNING TRAJECTORIES 失效
标题翻译：具有多个部分扫描轨迹的锥体光束计算机图
公开(公告)号：US20090262885A1
公开(公告)日：2009-10-22
申请号：US12296945
申请日：2006-04-19
申请人： Claas Bontus , Thomas Koehler , Peter Koken , Andy Ziegler
发明人： Claas Bontus , Thomas Koehler , Peter Koken , Andy Ziegler
IPC分类号： A61B6/00
CPC分类号： G06T11/006 , A61B6/027 , G06T11/005
摘要： A computer tomography apparatus (100) for examination of an object of interest (107) comprising an electromagnetic radiation source (104) adapted to emit electromagnetic radiation to an object of interest (107), a detecting device (108) adapted to detect electromagnetic radiation generated by the electromagnetic radiation source (104) and passed through the object of interest (107), and a motion generation device (101, 119) adapted to move the electromagnetic radiation source (104) and the detecting device (108) with respect to the object of interest (107) along a first trajectory and along a second trajectory which differs from the first trajectory, wherein the second trajectory is selected in such a manner that electromagnetic radiation detected during performing the second trajectory provides data which complete mathematically incomplete data detected during performing the first trajectory to thereby allow a reconstruction of structural information concerning the object of interest (107).
摘要翻译：一种用于检查感兴趣对象（107）的计算机断层摄影装置（100），包括适于向感兴趣对象（107）发射电磁辐射的电磁辐射源（104），适于检测电磁辐射的检测装置由电磁辐射源（104）产生并通过感兴趣物体（107）的运动产生装置（101,119），适于相对于电磁辐射源（104）和检测装置（108）移动感兴趣的物体（107）沿着第一轨迹并且沿着与第一轨迹不同的第二轨迹，其中以这样的方式选择第二轨迹，使得在执行第二轨迹期间检测到的电磁辐射提供了完全数学上不完整的数据检测的数据在执行第一轨迹期间，从而允许重建关于感兴趣对象的结构信息（107）。

4. 发明申请

US20070183639A1 Motion compensation 有权
标题翻译：运动补偿
公开(公告)号：US20070183639A1
公开(公告)日：2007-08-09
申请号：US10598421
申请日：2005-02-23
申请人： Thomas Kohler , Michael Grass , Tim Nielsen , Peter Koken
发明人： Thomas Kohler , Michael Grass , Tim Nielsen , Peter Koken
IPC分类号： G06K9/00 , G06K9/40
CPC分类号： G06T11/006 , G06T2211/412
摘要： Using only projection data in one temporal gating window around a certain target phase point may lead to motion artifacts such as blurred images. By using projection data corresponding to three temporal gating windows, which are slightly shifted with respect to each other but at least partially overlap, motion within the gating window may be estimated and, according to an exemplary embodiment of the present invention, this estimation may be used for improving the image quality. Advantageously, only the projection data inside the at least partially overlapping gating windows are used for reconstruction and motion compensation.
摘要翻译：在某个目标相位点周围的一个时间门控窗口中仅使用投影数据可能会导致运动伪影，如模糊图像。通过使用对应于相对于彼此略微偏移但至少部分重叠的三个时间门控窗口的投影数据，可以估计门控窗口内的运动，并且根据本发明的示例性实施例，该估计可以是用于提高图像质量。有利地，仅将至少部分重叠的门控窗口内的投影数据用于重建和运动补偿。

5. 发明授权

US07630528B2 Motion compensation 有权
标题翻译：运动补偿
公开(公告)号：US07630528B2
公开(公告)日：2009-12-08
申请号：US10598421
申请日：2005-02-23
申请人： Thomas Kohler , Michael Grass , Tim Nielsen , Peter Koken
发明人： Thomas Kohler , Michael Grass , Tim Nielsen , Peter Koken
IPC分类号： G06K9/00 , A61B6/00
CPC分类号： G06T11/006 , G06T2211/412
摘要： Using only projection data in one temporal gating window around a certain target phase point may lead to motion artifacts such as blurred images. By using projection data corresponding to three temporal gating windows, which are slightly shifted with respect to each other but at least partially overlap, motion within the gating window may be estimated and, according to an exemplary embodiment of the present invention, this estimation may be used for improving the image quality. Advantageously, only the projection data inside the at least partially overlapping gating windows are used for reconstruction and motion compensation.
摘要翻译：在某个目标相位点周围的一个时间门控窗口中仅使用投影数据可能会导致运动伪影，如模糊图像。通过使用对应于相对于彼此略微偏移但至少部分重叠的三个时间门控窗口的投影数据，可以估计门控窗口内的运动，并且根据本发明的示例性实施例，该估计可以是用于提高图像质量。有利地，仅将至少部分重叠的门控窗口内的投影数据用于重建和运动补偿。

6. 发明申请

US20110156704A1 B1-MAPPING AND B1L-SHIMMING FOR MRI 有权
标题翻译：用于MRI的B1映射和B1L-SHIMMING
公开(公告)号：US20110156704A1
公开(公告)日：2011-06-30
申请号：US13063472
申请日：2009-09-10
申请人： Peter Boernert , Peter Koken , Kay Nehrke , Ulrich Katscher , Ingmar Graesslin
发明人： Peter Boernert , Peter Koken , Kay Nehrke , Ulrich Katscher , Ingmar Graesslin
IPC分类号： G01R33/34
CPC分类号： G01R33/583 , G01R33/246 , G01R33/3415 , G01R33/4838 , G01R33/5612 , G01R33/5659 , G01R33/586
摘要： The invention relates to a method of acquiring MRI image data comprising the following steps: performing a 3-dimensional B1 mapping of a first volume using a first voxel size, selecting an MRI protocol, performing the B1-shim in accordance with the MRI protocol, performing the MRI protocol to acquire MRI imaging data of a second volume using a second voxel size, wherein the first voxel size is larger than the second voxel size, wherein the first volume is larger than the second volume, and wherein the second volume is contained within the first volume.
摘要翻译：本发明涉及一种获取MRI图像数据的方法，包括以下步骤：使用第一体素大小执行第一体积的3维B1映射，选择MRI协议，根据MRI协议执行B1-垫片，执行MRI协议以使用第二体素尺寸获取第二体积的MRI成像数据，其中所述第一体素大小大于所述第二体素大小，其中所述第一体积大于所述第二体积，并且其中所述第二体积被包含在第一卷内。

7. 发明授权

US07778387B2 Reconstruction method for helical cone-beam CT 失效
标题翻译：螺旋锥束CT重建方法
公开(公告)号：US07778387B2
公开(公告)日：2010-08-17
申请号：US11913821
申请日：2006-05-03
申请人： Thomas Koehler , Claas Bontus , Peter Koken
发明人： Thomas Koehler , Claas Bontus , Peter Koken
IPC分类号： A61B6/00
CPC分类号： G06T11/006 , A61B6/027 , G06T2211/421
摘要： The invention relates to a method and a system for the reconstruction of an object function (f(x)) based on projections acquired during the motion of a radiation source on a helical trajectory (17). The method is particularly suited for an n-PI+ acquisition which by definition completely comprises an n-PI and additionally some overscan data from the (n+2)-PI window. According to the method, two sets (Σ≦m, Σ>m) of filtered projections are generated from the measuring values and separately back-projected to yield two absorption functions. The first absorption function (flf(x)) is based on contributions of Radon-planes with at most m intersections with the source trajectory (17), while the second absorption function (fhf(x)) is based on Radon-planes with more than m intersections with the source trajectory (17). The two absorption functions are added to yield the final absorption function (f(x)) of an object in the examination zone. In an approximative version of the method, the sets (Σ≦m, Σ>m) of filtered projections are first added and then back-projected.
摘要翻译：本发明涉及一种用于基于在螺旋轨迹（17）上的辐射源的运动期间获取的投影来重建对象函数（f（x））的方法和系统。该方法特别适用于n-PI +采集，其通过定义完全包括n-PI，并且另外还包括来自（n + 2）-PI窗口的一些过扫描数据。根据该方法，从测量值产生两组滤波投影（＆Sgr;＆nlE; m，＆Sgr？m），并分别反投影以产生两个吸收函数。第一吸收函数（flf（x））基于与源轨迹（17）最多m个交点的氡面的贡献，而第二吸收函数（fhf（x））基于具有更多的氡面而不是与源轨迹（17）的交点。添加两个吸收函数以产生检查区中物体的最终吸收函数（f（x））。在方法的近似版本中，首先添加过滤投影的集合（＆Sgr;＆nlE; m，＆Sgr;> m），然后反投影。

8. 发明申请

US20110112392A1 MR IMAGING WITH EXTENDED FIELD OF VIEW 有权
标题翻译：成像与扩展视野
公开(公告)号：US20110112392A1
公开(公告)日：2011-05-12
申请号：US13000386
申请日：2009-06-18
申请人： Peter Boernert , Jochen Keupp , Peter Koken , Kay Nehrke
发明人： Peter Boernert , Jochen Keupp , Peter Koken , Kay Nehrke
IPC分类号： A61B5/055
CPC分类号： G01R33/56375 , G01R33/56383
摘要： Magnetic resonance examination system comprises displaceable carrier for supporting an object to be examined. The carrier can be moved over a two dimensional area. The magnetic resonance examination system is configured to acquire sets of magnetic resonance signals from the object for various positions of the carrier in the two dimensional area.
摘要翻译：磁共振检查系统包括用于支撑被检查物体的可移位载体。载体可以在二维区域上移动。磁共振检查系统被配置为从二维区域中的载体的各个位置获取来自物体的磁共振信号。

9. 发明授权

US09968277B2 Magnetic resonance guidance of a shaft to a target zone 有权
公开(公告)号：US09968277B2
公开(公告)日：2018-05-15
申请号：US14007990
申请日：2012-04-04
申请人： Steffen Weiss , Ronaldus Frederik Johannes Holthuizen , Sascha Krueger , Peter Koken , Daniel Wirtz , Thomas Erik Amthor , Falk Uhlemann
发明人： Steffen Weiss , Ronaldus Frederik Johannes Holthuizen , Sascha Krueger , Peter Koken , Daniel Wirtz , Thomas Erik Amthor , Falk Uhlemann
IPC分类号： A61B5/055 , G01R33/28 , A61B5/06 , A61B5/00 , G01R33/34
CPC分类号： A61B5/055 , A61B5/064 , A61B5/6832 , A61B5/72 , G01R33/287 , G01R33/34084
摘要： A medical apparatus (1100) comprising a magnetic resonance imaging system and an interventional device (300) comprising a shaft (302, 1014, 1120). The medical apparatus further comprises a toroidal magnetic resonance fiducial marker (306, 600, 800, 900, 1000, 1122) attached to the shaft. The shaft passes through a center point (610, 810, 908, 1006) of the fiducial marker. The medical apparatus further comprises machine executable instructions (1150, 1152, 1154, 1156, 1158) for execution by a processor. The instructions cause the processor to acquire (100, 200) magnetic resonance data, to reconstruct (102, 202) a magnetic resonance image (1142), and to receive (104, 204) the selection of a target volume (1118, 1144, 1168). The instructions further cause the processor to repeatedly: acquire (106, 206) magnetic resonance location data (1146) from the fiducial marker and render (108, 212) a view (1148, 1162) indicating the position of the shaft relative to the target zone.

10. 发明授权

US09797973B2 MR imaging with extended field of view 有权
公开(公告)号：US09797973B2
公开(公告)日：2017-10-24
申请号：US13000386
申请日：2009-06-18
申请人： Peter Boernert , Jochen Keupp , Peter Koken , Kay Nehrke
发明人： Peter Boernert , Jochen Keupp , Peter Koken , Kay Nehrke
IPC分类号： A61B5/00 , G01R33/563
CPC分类号： G01R33/56375 , G01R33/56383
摘要： Magnetic resonance examination system comprises displaceable carrier for supporting an object to be examined. The carrier can be moved over a two dimensional area. The magnetic resonance examination system is configured to acquire sets of magnetic resonance signals from the object for various positions of the carrier in the two dimensional area.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式